CN108249716A - A kind of method of municipal sludge effective, harmlessization processing - Google Patents
A kind of method of municipal sludge effective, harmlessization processing Download PDFInfo
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- CN108249716A CN108249716A CN201810143651.4A CN201810143651A CN108249716A CN 108249716 A CN108249716 A CN 108249716A CN 201810143651 A CN201810143651 A CN 201810143651A CN 108249716 A CN108249716 A CN 108249716A
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- China
- Prior art keywords
- municipal sludge
- effective
- organic matter
- reaction kettle
- harmlessization
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/20—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/40—Treatment of liquids or slurries
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pest Control & Pesticides (AREA)
- Molecular Biology (AREA)
- General Chemical & Material Sciences (AREA)
- Biotechnology (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Plant Pathology (AREA)
- Inorganic Chemistry (AREA)
- Tropical Medicine & Parasitology (AREA)
- Fertilizers (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to municipal sludge processing technology fields, and in particular to a kind of method of municipal sludge effective, harmlessization processing；It the specific steps are：1）The municipal sludge of moisture content after plate compression 50 65% is crushed；2）Municipal sludge after crushing is delivered in reaction kettle, and the organic matter for adding municipal sludge weight 18 22% in step 1 is mixed；3）The innocent treatment agent for adding in municipal sludge and organic matter total weight in step 2 4% 6% in a kettle is mixed；4）The daily early, middle and late interval of mixture in step 3 reaction kettle is stirred once for 35 hours, each mixing time is 18 22 minutes, continues 68 days；A kind of method of municipal sludge effective, harmlessization processing of the present invention, it, except water vapour, is avoided the use of aerator, reduces the class requirement of reaction kettle using stirring ventilation cooling；Its innocent treatment agent can preferably be handled the nuisances such as the harmful bacteria in municipal sludge, heavy metal.
Description
Technical field
The present invention relates to municipal sludge processing technology fields, and in particular to a kind of side of municipal sludge effective, harmlessization processing
Method.
Background technology
China's municipal sludge yield is incremented by every year, now annual about to generate 40,000,000 tons or so, municipal municipal sludge（Moisture content
80%）, it is contemplated that ten thousand tons of 6000-9000 is up to, but municipal sludge effective percentage is relatively low to the year two thousand twenty China municipal sludge annual output,
Lack the treatment technology of independent intellectual property right.Municipal sludge minimizing, innoxious, recycling are the three principles of circular economy,
In 2014 during active municipal sludge 100 anniversary of birth, scientist thinks：Three principles are must to want resource to municipal sludge
And the energy, maximized organic matter recycle.In the countries such as English, method, moral, municipal sludge harmless treatment, recycling
By very big attention, municipal sludge is 40%, 60% and more than 60% as the ratio that agricultural land utilizes.And in China, municipal administration dirt
Mud treatment technology mainly to burn, fill, based on building materials, fill to water resource, burn to air, have it is different degrees of secondary
Pollution.It not being truly realized and harmless treatment is carried out in itself to municipal sludge, be allowed to recycling, soil lacks organic matter,
And the content of organic matter in municipal sludge is more than 30%, and containing trace elements such as a small amount of nitrogen, phosphorus, potassium, burning is burn-up
Resource；Municipal sludge derives from the Nature, goes back to nature, is to follow law of nature, it is to follow that municipal sludge is allowed, which to turn waste into wealth,
The technology path of green, low-carbon cycle, is that we revere the Nature.
Some new methods, new technology disclose, but Shortcomings in practice at present, are needed in treatment process plus drying fills
It puts：Aerator is aerated drying, and moisture content is uneven, and the treatment process time is long, and stinking smell assaulting one's nostrils in processing, unfriendly to environment, place
It is small to manage quantity, condition is harsh, there are secondary pollution problems, it is difficult to promote.
Invention content
At a kind of municipal sludge effective, harmless
The method of reason, it the specific steps are：1）The municipal sludge of moisture content 50-65% after plate compression is crushed；2）It will crush
Municipal sludge afterwards is delivered in reaction kettle, and the organic matter for adding municipal sludge weight 18-22% in step 1 is mixed；3）
Add in the innoxious place of municipal sludge and organic matter total weight 4%-6% in step 2 in a kettle while organic matter is added in
Agent is managed to be mixed；4）Mixture in step 3 reaction kettle daily early, middle and late interval is stirred once, often for 3-5 hours
Secondary mixing time is 18-22 minutes, continues 6-8 days.
Preferably：Municipal sludge moisture content in step 1 is 55%.
Preferably：Organic matter weight ratio in step 2 is 20% of municipal sludge weight in step 1；Organic matter and step
Municipal sludge after being crushed in rapid 1 delivers into reaction kettle using layer-stepping and is mixed.
Preferably：Mixture mixing time in step 4 separately 4 hours, stirring 20 minutes, continue 7 days every time.
Preferably：Organic matter in step 2 is wheat bran slag or stalk slag.
Preferably：Innocent treatment agent in step 3 be containing bacillus subtilis, the red Pseudomonas alba in marsh,
The municipal sludge inorganic agent of lactic acid bacteria bacillus, attapulgite and turf.
Preferably：Reaction kettle inner space height in step 2 is 1.8 meters, and radius is 0.9 meter.
Preferably：Stirring means in step 2 and step 3 are reaction kettle agitating paddle twist, rotating speed 5-8RPM.
A kind of method of municipal sludge effective, harmlessization processing of the present invention, it is dirty that its purpose is to provide a kind of municipal administration
The method of mud effective, harmlessization processing.It is more scientific, reasonable, advanced right by the method with municipal sludge harmless treatment
The nuisances such as the harmful bacteria in municipal sludge, heavy metal are handled, and are finally turned waste into wealth, and operating cost is cheap；It solves existing
Stink is big in treatment process, unfriendly to environment, and treating capacity is small, and condition is harsh, and processing time is long, there is secondary pollution, equipment profit
With rate it is low the problem of；It reduces part to invest, is more suitable for mass producing, one-stop processing, does not generate secondary pollution, realization allows city
Political affairs sludge is benefited by harmless treatment, recycling for the mankind.
The technical solution adopted by the present invention：By adding commercially available innocent treatment agent, with reference to this system technique reality
Existing this programme.
The present invention has the beneficial effect that：A kind of method of municipal sludge effective, harmlessization processing of the present invention, it is used
Stirring ventilation cooling avoids the use of aerator, reduces the class requirement of reaction kettle except water vapour；It is using innoxious
Inorganic agent can preferably be handled the nuisances such as the harmful bacteria in municipal sludge, heavy metal, and solve existing processing work
Stink is big in skill, and treating capacity is small, and processing time is long, there is the problem of secondary pollution；It by traditional municipal sludge processing time by
It shorten within 20 days one week, the municipal sludge appearance after reaction becomes yellowish-brown, and is loose fine grained, free from extraneous odour, and shale becomes
Mineralising matter and humus, only need to add suitable nitrogen, phosphorus, potassium can reach organic fertilizer standard, be detected through Pu Ni testing agencies, object
Material moisture content is down to 30% hereinafter, PH is neutrality, and heavy metal index is below national allowed band, organic matter（Butt）% >=45,
Excrement colibacillus group number 3/g of ＜, finally turn waste into wealth, promote the well-being of mankind.
Specific embodiment
Below will with specific embodiment come the present invention will be described in detail, illustrative examples therein and explanation only be used for solve
The present invention is released, but not as a limitation of the invention.
Described in present embodiment a kind of municipal sludge effective, harmlessization processing method, it the specific steps are：
1）The municipal sludge of moisture content 50-65% after plate compression is crushed；2）Municipal sludge after crushing is delivered to reaction kettle
In, and the organic matter for adding municipal sludge weight 18-22% in step 1 is mixed；3）It is being reacted while organic matter is added in
The innocent treatment agent of municipal sludge and organic matter total weight 4%-6% in step 2 is added in kettle to be mixed；4）Step 3 is anti-
The daily early, middle and late interval of the mixture in kettle is answered to be stirred for 3-5 hours primary, each mixing time is 18-22 minutes, is held
It is 6-8 days continuous.
Preferably：Municipal sludge moisture content in step 1 is 55%.
Preferably：Organic matter weight ratio in step 2 is 20% of municipal sludge weight in step 1；Organic matter and step
Municipal sludge after being crushed in rapid 1 is mixed using layer-stepping；The mixing of layer-stepping is easier to stir the mixture for
It is even, generate reaction conducive to quick.
Preferably：Mixture mixing time in step 4 separately 4 hours, stirring 20 minutes, continue 7 days every time.
Preferably：Organic matter in step 2 is wheat bran slag or stalk slag；The hole of wheat bran slag and stalk slag is big, inhales
Water effect is good, and ferment effect is good.
Preferably：Innocent treatment agent in step 3 be containing bacillus subtilis, the red Pseudomonas alba in marsh,
The municipal sludge inorganic agent of lactic acid bacteria bacillus, attapulgite and turf；What is generated during bacillus subtilis thalli growth is withered
Lavendustin, polymyxins, nystatin, gramicidins isoreactivity substance have the conditioned pathogen of pathogenic bacteria or autogenous infection
Apparent inhibiting effect；The red Pseudomonas alba in marsh can be used for purification of water quality, sewage disposal, feed level microbe additive etc.,
And various bioactivators are rich in, and adaptable strong, it is resistant to the organic wastewater of high concentration and stronger decomposition and inversion
Ability also has the features such as certain tolerance and capacity of decomposition to poisonous substances such as phenol, cyanogen；Lactic acid bacteria can by carbohydrate fermentation into
Lactic acid inhibits the breeding of spoilage organisms, the toxin that resolution spoilage organisms generates；Attapulgite has sterilization and deodorization, detoxification, killing ability
By force, and specific surface area and Kong Rong between municipal sludge can be increased, there is absorption heavy metal and ion-exchange capacity and absorbs part
The effects that hydrogen sulfide gas；Turf is the main addition raw material of organic and inorganic fertilizer, is non-harmful green fertilizer, is given birth to it
Different kind organism bacterial manure, the high-effective organic and inorganic complex fertilizer of production, have many advantages, such as long-acting, pollution-free, nuisanceless, noresidue, are
Current China's emphasis promotes the preferable fertilizer for building " green ecological " agricultural environment.
Preferably：Reaction kettle inner space height in step 2 is 1.8 meters, and radius is 0.9 meter；Raw material is reacting
Compost aerobic fermentation is used in kettle, effect is good.The Chinese utility model patent that the applicant can be used in reaction kettle herein discloses
" sludge fermentation organic fertilizer manufacturing machine ", Patent No.：" CN201620875200.6 ", best results.
Preferably：Stirring means in step 2 and step 3 are reaction kettle agitating paddle twist, rotating speed 5-8RPM.
Innocent treatment agent in the present invention in step 3 is researched and developed for municipal sludge characteristic, although not yet application is special
Profit, but selling on the market, product formula belongs to confidential state, and product is in circulation status；In innocent treatment agent
The feed addictive quality catalogue for allowing to use for meeting the microbial inoculum selection Ministry of Agriculture the 105th bulletin and announcing in suitable municipal administration
The microbial inoculum of sewage sludge harmlessness processing, it is commercially available, conducive to fermentation；The essence of fermentation is the effect of enzyme and is made by biochemistry
With the larger molecular organics in municipal sludge of degrading decompose hazardous compound, and deodorization, sterilizing, drop heavy metal accelerate fermentation rotten
Ripe, non-secondary pollution is environmentally friendly, and attapulgite also therein, sterilization and deodorization, detoxification, killing ability is strong, and can increase
Specific surface area and Kong Rong between municipal sludge have absorption heavy metal and ion-exchange capacity and absorb partial vulcanization hydrogen
The effects that.
The present invention is after charging one day, and material warms naturally to 45 degree of -50 degree left and right, and vapor is emerged during stirring；Through two
After it, temperature rises to 60 degree of -65 degree left and right, a large amount of vapor evaporations of when stirring；From second day to the 5th day, constant temperature was kept
60 degree of -65 degree left and right, slightly ammonia taste, and being evaporated with a large amount of vapor during stirring；Through early, middle and late each three times a day
A length of 20 minutes of time, using speed as 6 revs/min of stirring, temperature drops to less than 45 degree within the 6th day to the 7th day；It is above-mentioned anti-
Ying Hou, for temperature of charge substantially to room temperature, appearance becomes yellowish-brown, and is loose fine grained, free from extraneous odour, and shale characteristic is changed
Become, become mineralising matter and humus, then add the substances such as appropriate nitrogen, phosphorus, potassium and can be changed to organic fertilizer；When substantially shortening decomposed
Between 13 days.It is detected through Pu Ni testing agencies, material is down to 30% hereinafter, PH is neutrality containing the tax rate, and heavy metal index is below state
Family's allowed band, organic matter（Butt）% >=45,3/g of excrement colibacillus group number ＜（Far above requirements of the national standard, fecal coliform
100/g of group number ＜）Deng details are shown in the attachment of examination as to substances reference, and page 3 are the original municipal administration in step 1 wherein before attachment
Sludge composes Buddhist nun's examining report（GZBY0FDB96786502）；The 4-6 pages of attachment be using this method to former municipal sludge at
Spectrum Buddhist nun's examining report of the organic fertilizer 1 obtained after appropriate nitrogen, phosphorus, potassium is added in the substance obtained after reason
（GZASXERB96784529）；Page 3 are to add in the substance obtained after being handled using this method former municipal sludge after attachment
Add spectrum Buddhist nun's examining report of the organic fertilizer 2 obtained after appropriate nitrogen, phosphorus, potassium（GZASXERB96786529）.
A kind of method of municipal sludge effective, harmlessization processing of the present invention, it is steamed using stirring ventilation cooling water removal
Vapour avoids the use of aerator, reduces the class requirement of reaction kettle；It uses innocent treatment agent, can be preferably right
The nuisances such as the harmful bacteria in municipal sludge, heavy metal are handled, and solve in existing treatment process that stink is big, treating capacity
Small, processing time is long, there is the problem of secondary pollution；It by traditional municipal sludge processing time by shortening within 20 days one week, instead
Should after municipal sludge appearance become yellowish-brown, and be loose fine grained, free from extraneous odour, shale becomes mineralising matter and humus, then
It adds the substances such as appropriate nitrogen, phosphorus, potassium and can be changed to organic fertilizer；Through Pu Ni testing agencies detect, material water ratio be down to 30% with
Under, PH is neutrality, and heavy metal index is below national allowed band, organic matter（Butt）% >=45, excrement colibacillus group number ＜ 3/
g（Far above requirements of the national standard, 100/g of excrement colibacillus group number ＜）Deng finally turning waste into wealth, promote the well-being of mankind.
The above is only the better embodiment of the present invention, therefore all constructions according to described in present patent application range,
The equivalent change or modification that feature and principle are done, is included in the range of present patent application.
Claims (9)
- A kind of 1. method of municipal sludge effective, harmlessization processing, it is characterised in that：It the specific steps are：1）By plate compression The municipal sludge of moisture content 50-65% crushes afterwards；2）Municipal sludge after crushing is delivered in reaction kettle, and adds step The organic matter of municipal sludge weight 18-22% is mixed in rapid 1；3）Step is added in a kettle while organic matter is added in The innocent treatment agent of municipal sludge and organic matter total weight 4%-6% are mixed in rapid 2；4）It will be mixed in step 3 reaction kettle It closes object daily early, middle and late interval to be stirred within 3-5 hours once, each mixing time is 18-22 minutes, continues 6-8 days.
- 2. a kind of method of municipal sludge effective, harmlessization processing according to claim 1, it is characterised in that：In step 1 Municipal sludge moisture content be 55%.
- 3. a kind of method of municipal sludge effective, harmlessization processing according to claim 1, it is characterised in that：In step 2 Organic matter weight ratio for municipal sludge weight in step 1 20%；Municipal sludge after being crushed in organic matter and step 1 uses Layer-stepping delivers into reaction kettle and is mixed.
- 4. a kind of method of municipal sludge effective, harmlessization processing according to claim 1, it is characterised in that：In step 3 Innocent treatment agent weight ratio is 5% of municipal sludge and organic matter total weight in step 2；Powder in innocent treatment agent and step 1 Municipal sludge after broken is mixed using layer-stepping.
- 5. a kind of method of municipal sludge effective, harmlessization processing according to claim 1, it is characterised in that：In step 4 Mixture mixing time separately 4 hours, stirring 20 minutes, continue 7 days every time.
- 6. a kind of method of municipal sludge effective, harmlessization processing according to claim 1, it is characterised in that：In step 2 Organic matter be wheat bran slag or stalk slag.
- 7. a kind of method of municipal sludge effective, harmlessization processing according to claim 1, it is characterised in that：In step 3 Innocent treatment agent to contain bacillus subtilis, the red Pseudomonas alba in marsh, lactic acid bacteria bacillus, attapulgite and turf Municipal sludge inorganic agent.
- 8. a kind of method of municipal sludge effective, harmlessization processing according to claim 1, it is characterised in that：In step 2 Reaction kettle inner space height for 1.8 meters, radius is 0.9 meter.
- 9. a kind of method of municipal sludge effective, harmlessization processing according to claim 1, it is characterised in that：Step 2 and Stirring means in step 3 are anti-reaction kettle agitating paddle twist, rotating speed 5-8RPM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810143651.4A CN108249716A (en) | 2018-02-12 | 2018-02-12 | A kind of method of municipal sludge effective, harmlessization processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810143651.4A CN108249716A (en) | 2018-02-12 | 2018-02-12 | A kind of method of municipal sludge effective, harmlessization processing |
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| CN108249716A true CN108249716A (en) | 2018-07-06 |
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ID=62744871
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| CN201810143651.4A Pending CN108249716A (en) | 2018-02-12 | 2018-02-12 | A kind of method of municipal sludge effective, harmlessization processing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110092554A (en) * | 2019-04-28 | 2019-08-06 | 陕西同泽人居工程科技有限公司 | A kind of processing method about oilfield drilling spare |
| CN111484212A (en) * | 2020-03-27 | 2020-08-04 | 张天水 | Treatment method for removing heavy metals in sludge by using traditional Chinese medicine |
| CN113860954A (en) * | 2021-11-03 | 2021-12-31 | 华东师范大学重庆研究院 | Blue algae sludge treatment method |
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| CN103183540A (en) * | 2011-12-31 | 2013-07-03 | 中粮集团有限公司 | Biological organic fertilizer and preparation method thereof |
| CN104892281A (en) * | 2015-06-25 | 2015-09-09 | 金烜伊 | Production technology of organic orange dreg fertilizer |
| CN106431564A (en) * | 2016-08-31 | 2017-02-22 | 中创宏远（北京）环保科技有限公司 | Method for preparing organic fertilizer from domestic sludge and organic garbage through mixing |
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| AU2003243892A1 (en) * | 2002-05-13 | 2003-11-11 | Georg Fritzmeier Gmbh & Co. Kg | Composition and method for sanitizing biogenic wastes |
| CN102249508A (en) * | 2011-06-02 | 2011-11-23 | 广州科城环保科技有限公司 | Method for comprehensively utilizing sludge in recycling mode |
| CN103183540A (en) * | 2011-12-31 | 2013-07-03 | 中粮集团有限公司 | Biological organic fertilizer and preparation method thereof |
| CN104892281A (en) * | 2015-06-25 | 2015-09-09 | 金烜伊 | Production technology of organic orange dreg fertilizer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110092554A (en) * | 2019-04-28 | 2019-08-06 | 陕西同泽人居工程科技有限公司 | A kind of processing method about oilfield drilling spare |
| CN110092554B (en) * | 2019-04-28 | 2022-08-05 | 陕西同泽人居工程科技有限公司 | Method for treating drilling mud chips of oil and gas field |
| CN111484212A (en) * | 2020-03-27 | 2020-08-04 | 张天水 | Treatment method for removing heavy metals in sludge by using traditional Chinese medicine |
| CN113860954A (en) * | 2021-11-03 | 2021-12-31 | 华东师范大学重庆研究院 | Blue algae sludge treatment method |
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Application publication date: 20180706 |